49ers · Player

Sebastian Valdez

Sebastian Valdez
Position
DT
Number
#55
Age
24
Pieces here
27

On the record

Called Shots →
Held upSep 28, 2026

Matt Judon, signed to the San Francisco 49ers' practice squad on September 28, 2026, is on the club's active game-day roster for its Week 4 game against the Denver Broncos on Sunday, October 4, 2026. Either route counts: a standard elevation from the practice squad or a signing to the 53-man roster. The take is WRONG if he is not on that game-day roster, including if he is elevated or signed but declared inactive.

Written about him

Denver's 68-sack defense is next for Brock Purdy, who has not been sacked
Game Week

Denver's 68-sack defense is next for Brock Purdy, who has not been sacked

San Francisco (3-0) hosts Denver (2-1) at 1:25 p.m. Pacific on CBS. Brock Purdy has not been sacked this season, and the Broncos led the league with 68 sacks in 2025. Nick Bosa, James Thompson Jr. and Mykel Williams are out. Mike Evans, Dre Greenlaw, Keion White and Jaden Dugger are questionable. Matthew Judon and Malik Turner were elevated Saturday and Sebastian Valdez was promoted to the 53. Ten men to watch.

Sam KezarOct 4, 20264 min read
Matt Judon, sackless last season, is up for the Bosa week
49ers Notebook

Matt Judon, sackless last season, is up for the Bosa week

The 49ers promoted defensive tackle Sebastian Valdez from the practice squad to the active roster and waived Viliami Fehoko Jr. on Saturday. Matthew Judon and Malik Turner were elevated for Sunday's game against Denver. With Nick Bosa and James Thompson Jr. ruled out, nine defensive linemen are available, Judon included.

Sam KezarOct 3, 20263 min read
Shanahan has lost six of his ten defensive linemen. Arizona gets the rest.
Game Week

Shanahan has lost six of his ten defensive linemen. Arizona gets the rest.

San Francisco (2-0) hosts Arizona (1-1) at 1:05 p.m. Pacific on FOX. The 49ers play without Nick Bosa, Romello Height, James Thompson Jr. and C.J. West, four of the nine defensive linemen who played against Miami, and Kyle Shanahan says six of the ten linemen who made the team have been lost in two weeks. Viliami Fehoko Jr. and Sebastian Valdez are in line for their NFL debuts. Mike Evans is questionable and Jordan Watkins is set for his season debut. Arizona lost 31-7 to Seattle last week and has put cornerback Will Johnson on injured reserve. Ten men to watch.

Sam KezarSep 27, 20264 min read
The 49ers kept Bosa off injured reserve and put Demarcus Robinson there instead
49ers Notebook

The 49ers kept Bosa off injured reserve and put Demarcus Robinson there instead

The 49ers kept Nick Bosa on the 53-man roster on Saturday and placed receiver Demarcus Robinson on injured reserve. Defensive lineman Viliami Fehoko Jr. was promoted from the practice squad into Robinson's spot, and defensive linemen Kevin Givens and Sebastian Valdez were elevated for Sunday's game against Arizona. Matt Judon was among four free agents who worked out for the club. Brandin Cooks was not elevated, and Jordan Watkins is expected to make his season debut.

Sam KezarSep 26, 20263 min read

Also appears in

Greenlaw's suspension is over, and Kirk still needs a roster spot

Oct 20, 2026

Without Bosa, the defense Shanahan hoped would survive is third in points allowed

Oct 18, 2026

Bosa is out Monday, which Shanahan says is what the 49ers expected

Oct 17, 2026

The 49ers gave Seattle 17 points off turnovers and took 21 back

Oct 13, 2026

Seattle's turnovers made 21 points, and the 49ers still needed the last kick

Oct 12, 2026

Mykel Williams is back, and Matthew Judon paid for it

Oct 10, 2026

Denver built Sunday's zero. The hits that left with Bosa were Odighizuwa's

Oct 6, 2026

Week 4 takeaways: three points in seven drives, then Siran Neal forced a fumble

Oct 5, 2026

Dante Pettis is back because the 49ers have three healthy receivers

Sep 30, 2026

Arizona stopped itself three times, and then it scored on six of seven drives

Sep 29, 2026

Deebo Samuel played 76 percent of the snaps and was not targeted once

Sep 29, 2026

Week 3 takeaways: Arizona had the ball for 38 minutes and never led

Sep 28, 2026

Bosa will miss Denver, and the 49ers signed Matt Judon to the practice squad

Sep 28, 2026

Miami ran 17 of its 19 first-half designed runs between the guards

Sep 22, 2026

The 49ers won by 22 and came out of it needing a receiver and a lineman

Sep 21, 2026

Aaron Donald Did Not Travel And Myles Garrett Did

Sep 10, 2026

Nobody San Francisco Added Thursday Plays Defensive Tackle

Sep 10, 2026

Alfred Collins Is Out For The Year And His Replacement Is Whoever Is Already In Australia

Sep 9, 2026

Sam Okuayinonu Went On Injured Reserve And The Long Snapper Came Up

Sep 5, 2026

The Club Ruled Out Sam Okuayinonu Six Days Before Kickoff

Sep 4, 2026

Nate Hobbs Made The 53 On Sunday And Went On Injured Reserve On Monday

Aug 31, 2026

The 49ers Released Robert Jones And Traded For A Lineman Seven Minutes Later

Aug 30, 2026

Carver Willis Graded Last Among The 49ers Linemen A Week After Grading First On The Team

Aug 22, 2026